Details: This poster is for Sin City Casino and Lounge. It shows a woman in a red bikini carrying a tray of drinks. She is holding cards in her other hand. It says Sin City Casino & Lounge. Liquor in the Front. Poker in the Rear.
Sin City is a nickname for an urban area (a city or part of) that caters to various vices, perhaps the most well known example being Las Vegas, Nevada. These vices may be legal (depending on area) or illegal activities which are tolerated. Examples of vices include sex-related services (prostitution, strip clubs, sex shops, etc), gambling (casinos, betting shops, etc), or drug use.